Bug 342441 Unread / Read Statusbar panels get hidden and never become visible again

p=me r=mscott

mail/base/content/commandglue.js

@@ -477,6 +477,8 @@ function UpdateStatusMessageCounts(folder)
 
     unreadElement.setAttribute("label", numUnread);
     totalElement.setAttribute("label", numTotal);
+    unreadElement.hidden = false;
+    totalElement.hidden = false;
 
   }